Navigation device
First Claim
1. A navigation device for installation in a vehicle, comprising:
- a memory that stores request frequencies arranged by time period, each request frequency indicating a frequency at which traffic information distribution is to be requested from an information distribution center; and
a controller thatdetermines a request timing based on a current time and the stored request frequencies;
determines whether the request timing has elapsed since a previous traffic information distribution request;
when it is determined that the request timing has elapsed, transmits a request for distribution of the traffic information to the information distribution center; and
if the request is transmitted, receives the requested traffic information distributed from the information distribution center.
1 Assignment
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Accused Products
Abstract
Systems and methods store request frequencies arranged by time period, each request frequency indicating a frequency at which traffic information distribution is to be requested from an information distribution center. The systems and methods determine a request timing based on a current time and the stored request frequencies and determine whether the request timing has elapsed since a previous traffic information distribution request. When it is determined that the request timing has elapsed, the systems and methods transmit a request for distribution of the traffic information to the information distribution center and receive the requested traffic information distributed from the information distribution center.
61 Citations
20 Claims
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1. A navigation device for installation in a vehicle, comprising:
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a memory that stores request frequencies arranged by time period, each request frequency indicating a frequency at which traffic information distribution is to be requested from an information distribution center; and a controller that determines a request timing based on a current time and the stored request frequencies; determines whether the request timing has elapsed since a previous traffic information distribution request; when it is determined that the request timing has elapsed, transmits a request for distribution of the traffic information to the information distribution center; and if the request is transmitted, receives the requested traffic information distributed from the information distribution center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An information acquisition method for use with a navigation device installed in a vehicle, comprising:
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storing request frequencies arranged by time period, each request frequency indicating a frequency at which traffic information distribution is to be requested from an information distribution center; and determining a request timing based on a current time and the stored request frequencies; determining whether the request timing has elapsed since a previous traffic information distribution request; when it is determined that the request timing has elapsed, transmitting a request for distribution of the traffic information to the information distribution center; and if the request is transmitted, receiving the requested traffic information distributed from the information distribution center. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A navigation device for installation in a vehicle, comprising:
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means for storing request frequencies arranged by time period, each request frequency indicating a frequency at which traffic information distribution is to be requested from an information distribution center; and means for determining a request timing based on a current time and the stored request frequencies; means for determining whether the request timing has elapsed since a previous traffic information distribution request; means for transmitting, when it is determined that the request timing has elapsed, a request for distribution of the traffic information to the information distribution center; and means for receiving, if the request is transmitted, the requested traffic information distributed from the information distribution center.
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Specification